bump

用于加速比特币交易链上确认的接口

1.BumpFee

根据交易id追加手续费

BumpFee(txId string, fee int)

arguments

txID:需要加速的交易id 
fee:追加的费用（sat/vbyte）

return （标准json格式）

2.MergeUTXO

合并所有UTXO（会产生手续费）

MergeUTXO(feeRate int64) string

feeRate:指定费率（和比特币转账相同）

return：
{"success":true,"error":"","code":200,"data":{"txid":"0bcfaace971e9ebaacb4139811308e0500941806df3457a7ea83550d4c141736"}}

3.PendingSwap

ListPendingSwaps() string

{
"success": true,
"error": "",
"code": 200,
"data": {
    "pending_sweeps": [
        {
            "outpoint": "a282a610ab1f06f75fda2a73148375d75ee9b0af34506b12e36d2625f2ce002a:0",
            "witness_type": "TAPROOT_PUB_KEY_SPEND",
            "amount_sat": 1000,
            "sat_per_vbyte": 0,
            "broadcast_attempts": 0,
            "requested_sat_per_vbyte": 0,
            "immediate": false,
            "budget": 500,
            "deadline_height": 47427,
            "next_broadcast_height": 0,
            "requested_conf_target": 0,
            "force": false
        }
    ]
}